They will be promoting their opinion of you as an abuser
It is not right it is not fair - but it is what they will do.
STAY CLAM - above all else stay calm and be polite with them.
I had one client who wore a rubber band around his wrist so that he could snap it to remind him to stay calm because they made him feel so angry.
be honest and straightforward with them
Again a written list of questions and a written chronology will help